Date: Thu, 20 Oct 2022 16:49:11 GMT From: Warner Losh <imp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: e32e6e42fab3 - main - arm: Remove unused ffs.S Message-ID: <202210201649.29KGnBdK015426@gitrepo.freebsd.org>
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The branch main has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=e32e6e42fab35739e9a51309f316e2272081e0db commit e32e6e42fab35739e9a51309f316e2272081e0db Author: Warner Losh <imp@FreeBSD.org> AuthorDate: 2022-10-20 15:34:56 +0000 Commit: Warner Losh <imp@FreeBSD.org> CommitDate: 2022-10-20 16:48:31 +0000 arm: Remove unused ffs.S We've not used ffs.S since we retired armv[45] support. Remove it from the tree. Suggested by: andrew in D37069 Sponsored by: Netflix --- sys/libkern/arm/ffs.S | 58 --------------------------------------------------- 1 file changed, 58 deletions(-) diff --git a/sys/libkern/arm/ffs.S b/sys/libkern/arm/ffs.S deleted file mode 100644 index 871ca64b9a84..000000000000 --- a/sys/libkern/arm/ffs.S +++ /dev/null @@ -1,58 +0,0 @@ -/* $NetBSD: ffs.S,v 1.3 2003/04/05 23:27:15 bjh21 Exp $ */ -/*- - * Copyright (c) 2001 Christopher Gilbert - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the company nor the name of the author may be used to - * endorse or promote products derived from this software without specific - * prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, - * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <machine/asm.h> -__FBSDID("$FreeBSD$"); - - .syntax unified - -/* - * ffs - find first set bit, this algorithm isolates the first set - * bit, then multiplies the number by 0x0450fbaf which leaves the top - * 6 bits as an index into the table. This algorithm should be a win - * over the checking each bit in turn as per the C compiled version. - * - * under ARMv5 there's an instruction called CLZ (count leading Zero's) that - * could be used - * - * This is the ffs algorithm devised by d.seal and posted to comp.sys.arm on - * 16 Feb 1994. - */ - -ENTRY(ffs) - - /* Standard trick to isolate bottom bit in r0 or 0 if r0 = 0 on entry */ - rsb r1, r0, #0 - ands r0, r0, r1 - clzne r0, r0 - rsbne r0, r0, #32 - RET -END(ffs) -
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